Hurley tells Dogen Jacob is dead, temple goes into lockdown + Zach & Emma

Back at the temple, we see Zach and Emma, the tail section kids, for the first time since the season 3 episode "The Brig." They come to bring food and water to the survivors at Cindy's behest. Behind them, an unconscious Sawyer is dragged into the room with Miles pushed in behind him. Miles says that they were jumped in the jungle and Saywer took out four others/natives before he was knocked out with a rock.

Hurley is summoned to Dogen's office/greenhouse for a talk. Dogen, thru Lennon, asks what Jacob told him and asks when Jacob is coming to the temple. Hurley tells them that Jacob is dead, causing Dogen to look panicked and angry.

An alarm is sounded and Dogen orders the others/natives to their posts and to prepare the ash around the walls. He says "Defense to the east wall!" and "Ten men to north side!" Some others/natives set up a platform and shoot off a rocket flare.

They seem to be incredibly panicked about what is likely coming to the temple. Have they had to prepare for this before or is this the first battle they've faced?